After 1000 some minutes on a world researching alot i decided to warp and got this error message

The mod Warptorio2 (1.3.10) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event warptorio2::on_tick (ID 0)
The mod Factorissimo 2 - notnotmelon fork (1.2.3) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event factorissimo-2-notnotmelon::on_entity_cloned (ID 123)
factorissimo-2-notnotmelon/script/connections/belt.lua:69: attempt to index local 'outside_link' (a nil value)
stack traceback:
factorissimo-2-notnotmelon/script/connections/belt.lua:69: in function '?'
...ssimo-2-notnotmelon__/script/connections/connections.lua:133: in function 'init_connection'
...ssimo-2-notnotmelon__/script/connections/connections.lua:179: in function 'recheck_factory'
factorissimo-2-notnotmelon/control.lua:471: in function 'create_factory_exterior'
factorissimo-2-notnotmelon/control.lua:849: in function <factorissimo-2-notnotmelon/control.lua:840>
stack traceback:
[C]: in function 'clone_entities'
warptorio2/control_main.lua:988: in function 'Warp'
warptorio2/control_main.lua:861: in function 'Warpout'
warptorio2/control_main_helpers.lua:227: in function 'b'
warptorio2/lib/lib_control.lua:281: in function <warptorio2/lib/lib_control.lua:281>

Hi, this is an issue with the mod "factorissimo-2-notnotmelon" and not with Warptorio2. I encourage you to link the associated bug report discussion thread in this one so we can all bug-track this together :)

Had this error today as well, after trying things out it appears to happen when we first placed a (red) belt connection from a tier 2 factorissimo building to the outside. This was on the overworld level. Removing this belt fixed it for now as well :)